An Auckland truck driver is perplexed and annoyed after receiving a text message from his mobile phone provider saying he needs to cut down on calls, despite paying for "unlimited" calling.

Mike Oliver received a text from 2Degrees this month saying he needed to halve the number of calls he was making.

Otherwise, he risked being shut off from his "unlimited" calling plan under the company's fair use policy.

The truckie uses a hands-free bluetooth headset to call his friends while he's on the road.

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He's not sure exactly how many minutes he uses, but guesses he chats on the phone for about three hours a day.

Oliver has been a 2Degrees customer for close to six years, and has been on the unlimited plan since December last year.

"I do talk to my friends quite a bit in the morning, I call my mates and talk for maybe an hour," he told the Herald.

He hadn't noticeably increased the number of calls he'd made this month and couldn't understand why he'd suddenly got the text about a week ago, he said.

"I was gobsmacked by it. I've never received a text like that before."

Oliver called 2Degrees' customer service centre, where two employees told him that the unlimited calling plan was subject to a fair use policy.

"I said, 'what about me, I have unlimited phone calls and unlimited texts'. She said, 'no you don't sir', I said, 'what do you mean no I don't?'."

Truck driver Mike Oliver is annoyed he's been asked to cut back on his call use on his
Truck driver Mike Oliver is annoyed he's been asked to cut back on his call use on his "unlimited" 2 Degrees mobile plan. Photo / Supplied

Degrees, like Vodafone, has a fair use policy that says the company has the right to enforce reasonable use of unlimited calling and texting.

Spark does not, said spokeswoman Ellie Cross.

"The only circumstance in which we would limit usage is if a customer used a personal plan with unlimited calling for commercial purposes - doing things like using the plan to run a call centre or bulk telemarketing," she said.

"Your use of the services must be fair, reasonable and not excessive, as reasonably determined by us by reference to average and/or estimated typical customer usage of the services," 2Degrees says on its website.

"We will consider your usage to be excessive and unreasonable where it materially exceeds the average and/or estimated use patterns over any day, week or month (or other period of time as determined by us) (Excessive Usage)."

2Degrees spokeswoman Lenska Papich said it was common practice for telecommunications companies to apply fair use policies to "unlimited" calling plans to manage network performance and offer high-use plans to the majority.

"Generally our fair use policy only comes into play in outlying situations where a customer has used many, many times the call minute average, in that plan group, in any given month," Papich said.

"At this point we will commence contact with the customer in relation to their usage."

There was a difference between receiving a notification and actually having restrictions applied to an account, she added.

"For all intents and purposes our unlimited calling plans are just that for our customers.

"However, we are also very clear in our advertising materials that a fair use policy applies to manage outlying or excessive usage on these plans."

The text sent to Mike Oliver earlier this month. Photo / Supplied
The text sent to Mike Oliver earlier this month. Photo / Supplied

The company was unable to disclose how many minutes Oliver had used for privacy reasons, Papich said, and she could not provide information on what the average number of minutes used was for the unlimited plan because that information was commercially sensitive.

The company called Oliver after questions from the Herald and offered a different package, which he was not interested in.

"As far they're concerned, it's my fault," he said.

"It's my fault for having so many friends and speaking to all these people."

He thought calling the plan "unlimited" was misleading if there were restrictions in place in the fine print, he said.

"You've got a sign up there, 'unlimited minutes, unlimited texts'."

Oliver was locked into a mobile phone buy-back scheme until December this year and would lose money if he left his contract early.

He had called the Commerce Commission, but it would not investigate because "it appeared there was no significant consumer detriment", a spokesman said.

But Telecommunications Users Association chief executive Craig Young said: "'Unlimited' should be unlimited.

"Every 'unlimited' plan that I have seen comes with some significant constraints," he said.

"There has been some significant work done with the Commerce Commission around making those constraints known upfront."

Young pointed to Spark advertisements with asterisks next to the word "unlimited" which say: "Max speeds reduced after 22GB." But the warning refers only to data, and it is hard to find the fair use limits on talking.

Consumer NZ adviser Maggie Edwards advised Oliver to complain to the Telecommunications Dispute Resolution service (TDR).

TDR client director Jennifer Mahony said: "Fair use cases are all about the contract that the customer has with their provider. We would look at the terms and conditions of the customer's contract with the provider, the provider's fair use policy and description, as well as what was disclosed to the customer at the time they entered into the contract."

• TDR freephone 0508 98 98 98.
- additional reporting Simon Collins